Increase the size of the buffer used to read config file lines.

The config file format treats any character after a semicolon as a comment,
so that people can comment config after the line.  The current line limit
of 120 characters is easy enough to overflow with this sort of (sane)
documentation style; let's increase it to 1024 bytes.  Patch from Fedora's
bz#806963.
Merge pull request #11 from tphelps/bz806963

Bz806963